Value of a ListPreference never updates
I have a ListPreference
, but when I click on an item, the value doesn't update.
The getValue()
returns always the same thing.
When I reclick on the ListPreference
the value is unfortunately not changed.
My code :
ListPreference lp7 = (ListPreference) findPreference("paramUpdate");
lp7.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
public boolean onPreferenceChange(Preference preference, Object newValue) {
ListPreference listPref = (ListPreference) preference;
listPref.getValue();
return false;
}
});
Preferences xml:
<ListPreference android:key="paramUpdate"
android:tit开发者_开发技巧le="@string/paramUpdate"
android:summary="@string/paramSummaryUpdate"
android:entries="@array/update"
android:entryValues="@array/updateValues"
/>
Values:
<string-array name="update">
<item>24h</item>
<item>48h</item>
<item>72h</item>
<item>@string/never</item>
</string-array>
<string-array name="updateValues">
<item>24</item>
<item>48</item>
<item>72</item>
<item>0</item>
</string-array>
Where I am wrong ?
You have to return true
from your onPreferenceChangeListener
for the system to store the new value. See the docs for reference.
Some correctives, if you want to save preference value:
public boolean onPreferenceChange(Preference preference, Object newValue) {
ListPreference listPref = (ListPreference) preference;
int index = listPref.findIndexOfValue((String) newValue);
SharedPreferences.Editor editor = sp.edit();
editor.putInt("my_pref", index);
editor.apply();
return true;
}
Otherwise, ListPreference has updates, but saves from second time.
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